Review of Rock Properties

Question 1

the ratio of void space, or pore volume, to the total bulk volume of the rock.

Answer 1

POROSITY

Question 2

values range from 10% to 40% for _________ type reservoirs and 5% to 15% for
________ type reservoirs.

Answer 2

sandstone
limestone

Question 3

fraction, or percent, of the pore volume occupied by a particular fluid (oil, gas, or
water)

Answer 3

SATURATION

Question 4

the tendency of one fluid to spread on or adhere to a solid surface in the presence
of other immiscible fluids.

Answer 4

WETTABILITY

Question 5

the pressure difference across the curved interface formed by two immiscible fluids
in a small capillary tube.

Answer 5

CAPILLARY PRESSUR

Question 6

the fractional change in volume of the solid rock material (grains) with a unit
change in pressure.

Answer 6

Rock-matrix compressibility, 𝒄𝒓

Question 7

the fractional change in volume of the bulk volume of the rock with a unit change
in pressure.

Answer 7

Rock-bulk compressibility, 𝐜�

Question 8

he fractional change in pore volume of the rock with a unit change in pressure

Answer 8

Pore compressibility, 𝒄𝒑

Question 9

the ratio of the total pore space in the rock to that of the bulk volume

Answer 9

Absolute porosity

Question 10

percentage of interconnected pore space with respect to the bulk volume.

Answer 10

Effective porosity